RecycleView

private RecyclerView recyclerView;
private RecyclerView.Adapter myAdapter;
private List<String > mDatas;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //1.初始化化数据源
    initDatas();
    recyclerView=(RecyclerView)findViewById(R.id.rv);
    //2.添加布局
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    //3.添加适配器
    myAdapter=new MyRVAdapter();
    recyclerView.setAdapter(myAdapter);
    //4.添加分割线,只有通过这种add方法才可以设置分割线
    recyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL_LIST));
}